Fe_(2-x)CrMnAl_(x)Cu高熵合金的组织与性能

Microstructure and Properties of Fe_(2-x)CrMnAl_(xCu) High Entropy Alloy

本研究将Fe、Al作为联合变量进行微调,检测并分析Fe、Al共同变化对Fe_(2-x)CrMnAl_(x)Cu(x=1.3,1.4,1.5,1.6,1.7)高熵合金的相结构、微观组织、压缩性能、硬度、摩擦性能的影响。结果表明,Fe_(2-x)CrMnAl_(x)Cu高熵合金的枝晶间及枝晶组织均由bcc相构成,且枝晶内部析出有序bcc结构的FeAl相。随着Fe含量减少,Al含量的增加,其析出物含量略微增加,使得Fe_(2-x)CrMnAl_(x)Cu高熵合金的硬度不断增加。当x=1.6时,高熵合金的综合性能达到最佳,屈服强度为1205.43 MPa,抗压强度为1431.52 MPa,变形率为9.06%。

Fe and Al were used as joint variables for fine tuning,and the effects of the common changes of Fe and Al on the phase structure,microstructure,compression properties,hardness and friction properties of Fe_(2-x)CrMnAl_xCu(x=1.3,1.4,1.5,1.6,1.7) high entropy alloy were analyzed.The results show that the interdendrite and dendrite structure of Fe_(2-x)CrMnAl_(xCu) high entropy alloy are composed of bcc phase,and the ordered bcc FeAl phase is precipitated inside the dendrite,and the content of precipitates increases slightly with the decrease in Fe content and the increase in Al content.The hardness of Fe_(2-x)CrMnAl_(xCu) high entropy alloy keeps increasing.When x=1.6,the comprehensive performance of high entropy alloy reaches the best,with the yield strength of 1205.43 MPa,the compressive strength of 1431.52 MPa and the deformation rate of 9.06%.